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THE  STORY  OF  THE  PRIBILOF  FUR  SEALS 


U.S.  DEPARTMENT  OF  COMMERCE 

NATIONAL   OCEANIC    AND    ATMOSPHERIC   ADMINISTRATION 


Digitized  by  the  Internet  Archive 

in  2012  with  funding  from 

LYRASIS  Members  and  Sloan  Foundation 


http://www.archive.org/details/storyofpribiloffOOunit 


The  northern  fur  seal  is  one  of  the  world's  most  fascinating  creatures. 
The  animal   itself,  however,  is  no  more  fascinating  than  the  story  of  its 
life  since  man  first  interjected  himself  into  the  seal's  habitat.   It  is 
a  story  of  both  flagrant  plunder  and  outstanding  international  wildlife 
conservation. 

This  era  is  one  in  which  man  has  begun  to  appraise  the  price  he  has  paid 
for  progress,  in  the  form  of  damaged  environment  and  diminished  resources. 
Even  the  very   young  talk  knowledgeably  of  such  things  as  endangered  species, 
depletion  and     extinction.  The  story  of  the  northern  fur  seal  and 
its  Pribilof  Islands  home  stands  out  as  an  exciting  and  encouraging  example 
of  what  can  be  accomplished  through  sound  management,  intensive  research, 
and  international  cooperation.  From  a  point  at  which  this  valuable 
resource   had  been  hunted   to  near  extinction  by  indiscriminate  killing 
in  the  open  sea,  the  northern  fur  seal  has  been  nurtured  back  to  nearly 
an  optimum  population  level.  The  fur  seal  population  dropped  to  a  point 
below  300,000  in  1910.  Today  the  Alaska  fur  seal  herd  numbers  an 
estimated  1.4  million  animals,  a  healthy  population  from  which  surplus 
young  males  are  selectively  harvested  on  St.  Paul  Island.   It  is  one  of 
the  most  dramatic  conservation  achievements  recorded  since  man  first 
began  making  serious  efforts  to  undo  some  of  the  damage  he  has  inflicted 
on  his  environment  and  the  living  natural  resources  it  sustains. 


Breeding  Grounds  of  the  Fur  Seal 

In  addition  to  the  Pribilof  Islands,  northern  fur  seals  presently  breed  in 
large  numbers  on  the  Commander  Islands  at  the  Soviet  end  of  the  Aleutian 
chain,  and  on  Robben  Island  off  Sakhalin.  Small  populations  of  fur  seals 
breed  on  the  Kuril  Islands,  between  Kamchatka  and  Hokkaido,  and  on  San 
Miguel  Island  and  Castle  Rock  off  California.  Approximately  80  percent 
of  the  world  population,  however,  breeds  on  the  Pribilof  Islands  of  St. 
Paul,  St.  George  and  Sea  Lion  Rock. 

The  conservation  of  this  migratory  herd  of  fur  seals  is  governed  by  an 
international  agreement  between  the  United  States,  Canada,  Japan,  and 
the  Soviet  Union.  The  United  States  has  held  jurisdiction  oyer   the 
Pribilofs  since  the  purchase  of  Alaska  from  Russia  in  1867  and  has 
closely  managed  the  seal  herd  since  1911  through  various  Federal  agencies, 
currently  the  National  Marine  Fisheries  Service.  Previously  the  resource 
was  not  always  protected,  and  at  several  points  in  its  history,  the 
northern  fur  seal  was  exploited  to  the  brink  of  extinction. 

Fur  Sealing  History 

The  story  of  modern  man's  involvement  with  the  fur  seal  begins  in  the  18th 
century.  North  American  Indians  and  Aleuts  had  been  taking  fur  seals 
for  many  centuries  previously  for  subsistence  purposes  and  later  for  sale 
of  the  skins  to  traders.  George  Wilhelm  Steller,  a  German  naturalist  in 
the  service  of  Imperial  Russia,  was  marooned  on  Bering  Island  in  1741. 
The  wrecked  vessel,  commanded  by  Vitus  Bering,  was  returning  to  Kamchatka 


after  a  voyage  of  exploration  to  North  America.   Intrigued  by  the 
elaborate  social  structure  of  the  seal  and  sea  lion  herds  which  thronged 
the  island,  Steller  built  an  observation  blinc  overlooking  a  fur  seal 
rookery.  Here,  he  made  a  series  of  remarkably  precise  observations  which 
were  published  in  1751-one  of  the  earliest  behavior  analyses  of  any 
mamma  1 . 

About  40  years  later,  adventurous  sailing  skippers  from  New  England  and 
Europe  discovered  the  commercial  possibilities  in  the  large  herds  of 
southern  fur  seals  along  the  coast  of  South  America,  Antarctica,  and 
South  Africa.  During  the  next  half  century,  fur  seal  rookeries  on  Islo 
Alejandro  Selkirk  (formerly  Mas  Afuera),  Juan  Fernandez,  the  South 
Shetlands,  Prince  Edward,  the  Antipodes,  and  many  other  islands,  were 
destroyed  as  fast  as  they  were  discovered.  Literally  millions  of  pelts 
were  taken  and  populations  of  fur  seals  south  of  the  Equator  were  decimated 
rapidly.  Some  small  groups  survived,  however,  and  still  live  off  the 
coasts  of  South  Africa,  South  America,  Australia,  New  Zealand,  the 
Galapagos  Islands,  and  some  sub-Antarctic  islands.  Some  have  fully 
recovered ,  such  as  the  South  African  fur  seal. 

The  next  major  phase  in  the  chronology  of  the  fur  seal  developed  farther 
north  where  the  Russians  had  observed  hordes  of  seals  swimming  north- 
ward each  spring  through  the  passes  of  the  Aleutian  Islands,  disappear- 
ing into  the  fog  and  mist  of  the  Bering  Sea. 


In  1783,  Gerassim  Pribilof,  navigator  in  the  service  of  Imperial  Russia, 
joined  the  search  for  breeding  grounds  outside  the  Commander  Islands. 
His  discovery  of  St.  George  Island  in  1786  and  St.  Paul  in  1787  within  the 
group  of  islands  that  now  bears  his  name,  exposed  the  principal  breeding 
grounds  and  sanctuary  of  the  northern  fur  seal  to  exploitation  by  man. 
The  unrestricted  killing  of  seemingly  uncountable  numbers  began,  following 
virtually  the  same  pattern  which  nearly  eliminated  the  southern  fur  seal. 
Overnight  the  teeming  rookeries  of  the  Pribilofs  became  a  source  of 
sealskins  for  the  entire  world,  and  an  estimated  2.5  million  pelts  were 
taken  during  the  next  few  decades. 

During  this  period,  harvesting  was  uncontrolled  and  breeding  females 
were  unprotected.   In  1834,  when  it  was  obvious  that  the  herd  was  facing 
annihilation,  Russia  forbade  the  killing  of  females-and  the  fur  seal 
population  began  to  recover.  By  1867,  when  the  United  States  purchased 
Alaska  from  Russia,  including  the  Pribilofs,  the  herd  was  reported  to  be 
large  and  thriving. 

During  the  first  two  years  of  U.S.  jurisdiction,  a  number  of  indepen- 
dent sealing  companies  were  allowed  to  operate  on  the  islands  and  in  the 
first  season  an  estimated  200,000  to  300,  000  skins  were  taken,  a  number 
now  considered  to  be  excessive  for  healthy  management  of  the  herd.  To 
halt  this  destruction,  Congress  in  1869  established  the  Pribilofs  as  a 
special  reservation  to  protect  the  animals  while  they  were  on  their 
breeding  grounds,  and  in  addition  provided  for  a  controlled  harvest.  The 
U.S.  Treasury  Department  was  authorized  to  award  the  first  of  two 


consecutive  20-year  leases  for  sealing  on  the  islands  by  private 
companies  and  was  charged  with  seeing  that  the  lessees  spared  the  females 
and  took  only  that  number  of  young  males  specified  by  the  Government. 
Under  the  first  20-year  lease  the  lessee  was  authorized  to  take  100,000 
young  males  each  year   and  in  fact  harvested  just  under  two  million  seal- 
skins during  the  contract  period.  The  company  awarded  the  second  lease 
was  able  to  take  only  342,651  seals  probably         because  the 
contract  period  coincided  with  the  peak  of  pelagic  sealing.  This  totally 
unregulated  operation,  taking  mostly  females,  was  responsible  for  reducing 
the  Pribilof  herd  to  a  remnant  of  its  former  size. 

Fans  of  Jack  London  will  recall  that  the  author's  classic  "Sea  Wolf"  was 
a  tale  of  swashbuckling  open-sea  sealing.  Swashbuckling  it  may  have  been; 
devastating  to  the  seal  population  it  definitely  was.  Pelagic  sealing, 
primarily  by  sealers  from  the  United  States,  Canada,  and  Japan,  reached 
its  peak  in  1894  when  61,838  sealskins  were  taken.  From  1889  to  1909,  over 
600,000  animals  were  taken—and  at  least  that  many  or  more  were  lost  after 
being  wounded  and  not  recovered.  The  herd  had  now  been  reduced  from  an 
estimated  two  million  to  probably  300,000. 

Pelagic  sealing  was  even  more  disastrous  to  the  Alaska  herd  than  the  catch 
data  indicate.  Sealers  working  the  high  seas  killed  indiscriminately, 
without  regard  to  age  or  sex.  Since  females  out-numbered  males,  because 
of  the  distribution  of  the  sexes  at  sea,  from  60  to  80  percent  of  the 
pelagic  harvest  consisted  of  females.  Not  only  was  all  future  reproduction 
lost  from  the  females  killed,  but  dependent  pups  were  left  to  starve  on  land 


because  a  mother  seal,  with  rare  exceptions,  nurses  only  her  own  pup  . 

Pelagic  sealing  was  halted  in  July  1911  as  part  of  an  international 
agreement  when  the  United  States,  Great  Britain  (for  Canada),  Japan,  and 
Russia,  meeting  in  Washington,  concluded  a  convention  for  protection  of 
the  North  Pacific  fur  seals.  In  exchange  for  a  ban  on  pelagic  sealing, 
the  United  States  and  Russia  agreed  to  provide  Japan  and  Great  Britain  each 
with  15  percent  of  their  sealskin  harvests  on  rookery  islands  under  their 
jurisdiction.  Japan,  in  turn,  agreed  to  give  the  United  States,  Great 
Britain,  and  Russia  each  10  percent  of  its  annual  harvest  on  Robben  Island. 
Thus,  the  1911  agreement  became  the  instrument  that  finally  gave  much- 
needed  protection  to  the  seal  herds  and  also  provided  an  economic  gain 
for  the  countries  involved.  It  was  the  first  significant  step  toward  the 
type  of  international  cooperation  required  for  survival  of  the  fur  seal. 

Since  1910,  the  harvest  of  Alaska  fur  seals  has  been  supervised  and  carried 
out  by  the  Federal  Government,  now  by  the  Department  of  Commerce's  National 
Oceanic  and  Atmospheric  Administration  through  the  National  Marine 
Fisheries  Service.  Previously  the  Service's  predecessor  agencies  carried 
out  this  responsibility;  first  the  Bureau  of  Fisheries  in  the  Department 
of  Commerce  and  then  the  Bureau  of  Commercial  Fisheries,  Fish  and  Wildlife 
Service,  Department  of  the  Interior. 

To  rebuild  the  depleted  herd,  Congress  placed  a  ban  on  commercial  killing 
of  fur  seals  on  the  Pribilofs  from  1912  to  1917.  Some  seals  were  taken 
each  year  for  food  for  the  residents  of  the  islands.  Since  1917,  the  fur 
seal  harvest  has  been  under  strict  control,  normally  with  only  young  males 
taken  in  numbers  determined  to  be  surplus  to  maintenance  of  the  herd.  Under 


this       management,  the  population  increased  rapidly  and  by  the 
late  1930' s  had  become  so  abundant  that  Japan  became  concerned  about  the 
predatory  effects  of  the  large  fur  seal  herds  on  her  valuable  commercial 
fisheries.  In  1940  Japan  announced  intention  to  abrogate  the  fur  seal  treaty, 
which  she  did  in  October  1941. 

From  1942  until  1957,  the  Pribilof  Islands  herd  was  protected  in  the 
central  and  eastern  North  Pacific  Ocean  by  a  provisional  agreement  between 
Canada  and  the  United  States,  which  provided  Canada  with  20  percent  of  the 
annual  Pribilof  sealskin  harvest.  Presumably  there  were  no  pelagic  sealing 
operations  during  this  period,  except  for  a  few  thousand  seals  taken 
annually  by  the  Japanese  in  the  western  North  Pacific. 

A  new  interim  North  Pacific  Fur  Seal  Convention  similar  to  the  1911 
Convention  was  concluded  in  February  1957  by  Canada  (rather  than  Great 
Britain),  Japan,  the  Union  of  Soviet  Socialist  Republics,  and  the  United 
States.  It  established  a  Fur  Seal  Commission  comprised  of  representatives 
of  the  four  governments  to  coordinate  research  and  management  of  the  North 
Pacific  fur  seal  resource.  This  convention,  which  is  still  in  existence, 
also  provides  that  Canada  and  Japan  each  receive  15  percent  of  the  sealskins 
taken  commercially  by  the  United  States  on  the  Pribilofs  and  by  the  U.S.S.R. 
on  the  Commander  Islands  and  Robben  Island,  which  Japan  lost  to  the  U.S.S.R. 
as  a  result  of  World  War  II  treaties.  The  U.S.S.R.  now  has  control  of  all 
fur  seal  rookeries  off  the  Asian  coast.  The  Commission  provided  for  a  Stand- 
ing Scientific  Committee  which  meets  annually  to  recommend  research 
programs  and  harvesting  rates.  Invariably  the  Committee's  recommendations 


are  adopted  by  the  Commission. 

The  Fur  Seal  Act  of  1966,  which  put  the  convention  into  effect  domes- 
tically, renewed  the  authority  of  the  Secretary  of- the  Interior  to  provide 
for  the  conservation  and  protection  of  the  fur  seal  and  to  administer  the 
Pribilof  Islands  as  a  Federal  reservation.  In  October  1970,  that  authority 
was  transferred  to  the  Department  of  Commerce  where  the  National  Marine 
Fisheries  Service,  a  part  of  the  National  Oceanic  and  Atmospheric 
Administration,  now  supervises  the  harvest  of  fur  seals  on  St.  Paul  Island, 
largest  of  the  Pribilof  group. 

In  1973,  the  United  States  proposed  to  the  Commission  a  major  research 
program  which  involved  setting  aside  St.  George  Island  as  a  research 
reserve.  The  Commission  adopted  this  recommendation.  Seals  were  last 
harvested  for  commercial  purposes  on  St.  George  in  1972,  and  an  intensive 
research  program  was  initiated  on  the  Pribilof  Islands  in  1973  to  compare 
population  dynamics  and  behavior  between  the  harvested  population  on  St. 
Paul  and  unharvested  population  on  St.  George.  Results  of  this  study  are 
expected  to  make  a  significant  contribution  to  the  scientific  knowledge 
required  to  maintain  northern  fur  seal  herds  at  the  optimum  level. 

Physical  Characteristics 

The  fur  seal's  physical  features  are  remarkably  adapted  to  meet  its  needs, 
particularly  at  sea.  The  beautiful  fur,  of  such  quality  that  it  almost 
brought  about  the  seal's  extinction,  has  over  300,000  hairs  per  square  inch 
and  is  so  impermeable  to  water  that  the  skin  remains  dry  even  when  the  seal 
rubs  or  scratches  itself  in  the  water. 

10 


Body  temperature  is  about  100°  F  (38°  C)  and  overheating  from  unusual 
exertion  or  sunshine  when  on  land  causes  obvious  discomfort.  Body 
temperature  above  107°  F  (42°  C)  brings  on  heat  prostration  and  usually 
death. 

The  eyes  are  relatively  large  and  the  seal  can  see  ^/ery   well  at  night; 
it  feeds  primarily  at  night  since  many  important  food  species  rise 
to  the  upper  water  layers  during  darkness.  The  fur  seal  feeds  mainly  on 
small  schooling  fishes  such  as  anchovy,  capelin,  and  herring,  but  will 
take  advantage  of  whatever  species  are  available,  generally  pollock  in 
the  Pribilof  Islands  area.  In  deep  water  areas,  squid  is  a  mainstay  of 
its  diet.  Anchovy,  hake,  saury,  and  rockfish  are  other  principal  foods 
off  California  and  Oregon.  Off  the  coast  of  Washington,  herring,  rockfish, 
salmon,  and  anchovy  are  leading  foods,  while  herring  and  walleye  pollock 
make  up  a  major  part  of  its  diet  off  southeastern  Alaska.  Capelin  and 
sand  lance  are  important  foods  in  the  Gulf  of  Alaska,  the  Aleutian  Islands 
passess,  and  the  Bering  Sea.  However,  pollock  is  especially  important 
in  the  Bering  Sea.  Analyses  of  stomach  contents  indicate  that  the  fur 
seal  feeds  on  at  least  54  species  of  fish  and  nine  species  of  squid.  The 
fur  seal  diet  is  similar  in  the  western  North  Pacific  Ocean,  Sea  of  Japan, 
and  Okhotsk  Sea. 

Other  physical  characteristics  help  the  seal  to  survive  at  sea.   Its 
nostrils  can  be  voluntarily  closed,  and  the  external  ears  are  small, 
tightly  rolled  cylinders  each  with  a  narrow,  waxy  orifice  that  prevents  the 
entrance  of  water.  Its  36  teeth  are  arranged  so  that  each  lower  incisor 

11 


Figure  1.  An  adult  male  approaching  a  female  and  her  pup, 


12 


fits  into  a  notch  in  an  upper  incisor  and  the  upper  molars  and  premolars 
interlock  with  the  lowers,  giving  the  seal  such  an  efficient  bite  that  no 
fish  or  squid  can  escape. 

Seals  vary  considerably  in  size  and  weight  depending  on  sex  and  age  (Fig.  1) 
A  newborn  pup  weighs  10  to  20  pounds  (4.4-5.4  kg)  and,  if  it  survives,  will 
grow  into  a  mature  female  weighing  95  to  110  pounds  (43.1-49.9  kg)  or  an 
adult  male  weighing  from  400  to  over  600  pounds  (181.4-272.2  kg).  Seals 
selected  for  commercial  harvesting  are  usually  three  and  four  year  old 
males  averaging  62  pounds  (28.1  kg)  and  78  pounds  (35.4  kg)  respectively. 
At  birth,  the  average  male  is  26  inches  (66  cm)  long,  but  the  female  is  an 
inch  (2. 5. cm)  shorter.  A  large  adult  female  measures  56  inches  (142  cm), 
tip  of  nose  to  tip  of  tail;  a  male,  84  inches  (213  cm). 

The  color  of  a  seal's  fur  varies  considerably.  The  females  and  young  males 
are  gray  when  dry  and  appear  black  when  wet.  After  a  few  days  ashore  during 
the  breeding  season,  the  fur  of  the  breeding  female  is  stained  to  a  yellow- 
ish-brown color  by  mud  and  excrement  on  the  rookeries.  Although  cleaned 
somewhat  during  trips  to  sea,  the  pelage  is  not  restored  to  its  original 
color  until  molt  occurs.  Pups  are  black  when  born  in  early  summer  but 
turn  gray  in  September  and  October  as  a  result  of  their  first  molt.  Males 
over  six  years  old  are  predominantly  brownish-black,  but  vary  greatly  and 
may  be  dark  gray  or  reddish  brown.  The  male  begins  to  develop  a  short 
bushy  mane  on  his  shoulders  and  neck  at  about  six  years  of  age. 


13 


Distribution  of  the  Northern  Fur  Seal 

The  northern  fur  seal  is  a  widely  ranging  mammal  with  migratory  routes 
extending  down  both  sides  of  the  North  Pacific  ocean  to  about  32°  North 
Latitude.  On  the  eastern  side,  fur  seals  migrate  southward  to  the 
Channel  Islands  off  Santa  Barbara,  California.  In  the  western  Pacific 
Ocean,  they  range  from  the  Commander  Islands  to  seas  southwest  of  Tokyo  on 
northern  Honshu  and  into  the  Sea  of  Japan  and  Sea  of  Okhotsk. 

Seals  are  most  frequently  found  from  10  to  100  miles  (16-145  km)  offshore; 
in  most  abundant  numbers  between  30  and  70  miles  (48-113  km).  Major 
areas  of  concentration  off  North  America  are  the  Farallon  Grounds  extending 
from  Point  Conception  to  Point  Arena  off  California,  the  Vancouver  Grounds 
reaching .from  south  of  the  Columbia  River  to  the  north  end  of  Vancouver 
Island,  the  Fairweather  Grounds.  Seals  also  congregate  on  Portlock  Bank 
off  Kodiak  Island  and  near  the  Sanak  Islands.  Full  grown  males  winter 
principally  in  Alaskan  waters  and  are  seen  most  frequently  in  the  Gulf  of 
Alaska. 

International  research  reveals  a  considerable  amount  of  intermixing  between 
seals  from  Americaiand  Asian  islands.  Tagging  studies  suggest  that 
roughly  20  to  30  percent  of  the  seals  of  ages  three  to  five  years  that  are 
found  off  the  coast  of  Japan  in  winter  and  spring  come  from  the  Pribilof 
Islands.  Also  it  appears  that  male  seals  from  the  Commander  Islands  make 
up  about  one  percent  of  the  annual  commercial  kill  of  seals  on  the  Pribilofs 
and  that  the  Pribilofs  contribute  about  10  to  25  percent  of  the  seals 
harvested  each  year  on  the  Commander  Islands.  Over  96  percent  of  the  fur 

14 


seals  found  off  Western  North  America  are  from  the  Pribilof  Islands. 

Unless  sick  or  injured,  fur  seals  rarely  touch  land  from  the  time  they 
leave  their  rookery  islands  in  the  fall  until  they  return  the  following 
year.  Most  people  living  along  coastal  areas  of  the  Western  United  States 
are  unaware  that  many  thousands  of  fur  seals  feed  and  rest  for  several 
winter  months  in  the  nearby  ocean,  particularly  off  California.  They  often 
are  seen  asleep  on  the  ocean  surface,  floating  on  their  side  or  back,  with 
all  four  flippers  folded  or  with  one  or  more  stretched  into  the  air.  On  the 
island  rookeries,  however,  all  such  languor  disappears  and  activity  continues 
unabated,  day  and  night. 

Fur  Seal  Reproduction 

Snowdrifts  have  not  melted  completely  on  the  mist-shrouded  Pribilofs  when, 
in  late  May  and  early  June,  the  big  breeding  males  begin  to  appear  on  the 
three  islands  that  have  rookeries:  St.  Paul,  St.  George,  and  Sea  Lion  Rock. 
Between  10  and  17  years  of  age  and  heavy  with  fat  from  the  long  winter's 
feeding,  the  males  lumber  ashore  where  each  establishes  his  own  individual 
territory.  Other  adult  males  enter  a  belligerent  "beachmaster's"  personal 
territory  only  at  considerable  risk. 

The  adult  males  enjoy  a  brief  period  of  rest  on  land  but  after  mid-June 
when  the  females  begin  to  arrive,  there  is  little  respite  for  the  huge 
"beachmasters" .  Each  male  vigorously  defends  his  territory  and  intercepts 
as  many  of  the  relatively  docile  mature  females  as  he  can  when  they  attempt 
to  pass  nearby  on  their  way  from  the  sea  onto  the  rookery.  The  number  of 

15 


females  in  a  male's  territory  varies  from  1  to  100  (Figs.  2,  3,  4,  5),  but 
the  average  is  about  60.  Day  and  night  the  air  is  filled  with  the  bleating 
of  females  and  young  and  the  roars  of  the  mighty  "beachmasters"  as  each 
defends  his  territory  against  his  neighbor  and  keeps  the  unbred  females 
"home"  through  intimidation  or  force.  Battles  between  males  are  frequent 
and  sometimes  savage.  From  May  until  the  end  of  the  breeding  season,  they 
gradually  lose  the  layers  of  fat  with  which  they  came  ashore  (Fig.  6). 

After  a  one  year  gestation  period,  the  pregnant  female  gives  birth  to  a 
12-pound  pup  within  48  hours  after  she  comes  on  land,  and  mates  again 
within  a  week.  Because  of  an  unusual  reproductive  cycle,  however,  develop- 
ment of  her  newly  formed  embryo  is  halted  at  an  early  stage  for  about  four 
months,  or  until  November,  when  implantation  in  the  uterus  occurs  and  fetal 
growth  begins  anew. 

Fur  seal  pups  can  swim  at  birth.  They  first  venture  into  the  water  when 

about  four  weeks  old,  and  gradually  increase  their  stay  there  through  the 

weeks  ahead.  In  November  the  pups  leave  the  rookeries  on  a  swim  destined 
to  last  as  long  as  two  years  for  some. 

The  pups  are  active  and  precocious,  with  wide-open  eyes.  Coats  of  black 
hair  are  molted  and  replaced  by  fur  in  the  autumn.  They  depend  entirely  on 
the  mother's  milk  for  food  and  the  female  generally  stays  close  to  her 
pup  for  several  days,  then  goes  to  sea  to  feed  where  she  may  remain  for  a 
week  and  travel  as  far  as  200  miles  from  the  rookery.  When  she  returns, 
the  pup  takes  on  several  times  more  milk  than  would  a  human  infant  of 
the  same  body  weight.  The  pup  must  obtain  enough  of  the  rick  milk, 

16 


Figure  2.  13  JUNE  -  By  mid-June  most  of  the  "beachmasters"  have 
established  their  territories  and  await  the  arrival  of  the  females. 
Most  fur  seals  of  breeding  age  return  to  the  rookery  of  their  birth. 


17 


-^" 


Figure  3.  28  JUNE 


By  late  June  the  first  females  arrive  and  the 


adult  males  begin  to  gather  them  into  their  territories.  The  pups  are 
born  soon  after  the  females  come  ashore.  As  the  pups  grow  stronger,  they 
eventually  form  groups  or  pods  and  wander  over  the  rookery,  while  their 
mothers  spend  much  time  at  sea  searching  for  food. 


18 


Figure  4.  8  JULY  -  In  early  July  the  groups  remain  closely  knit  on  the 
crowded  rookeries. 


19 


Figure  5.  3  AUGUST  -  In  late  July  or  early  August  the  organized  social 
structure  begins  to  break  up  and  the  animals  start  to  spread  out. 


20 


Figure  6.  Adult  male  seal 


21 


containing  about  50  percent  butterfat,  to  survive  between  the  widely- 
spaced  feedings.  The  mother  seal  feeds  only  her  own  pup  and,  despite 
lengthy  absences  between  nursings,  finds  her  own  among  the  thousands  of 
pups  on  the  rookery. 

The  female  seals  nurse  their  young  for  three  to  four  months,  and  are 
completely  protected  on  the  rookery  from  all  human  activity  except  minor 
disturbances  associated  with  scientific  research  to  enumerate  the  population 

As  the  weather  worsens  in  November,  the  fur  seals  leave  their  Pribilof 
breedings  grounds  to  spend  the  next  several  months  at  sea,  until  the 
reproductive  cycle  begins  anew  the  following  summer. 

Early  mortality  among  the  pups  is  high.  Many  succumb  to  disease,  injury, 
and  malnutrition  on  the  islands  before  starting  their  migration;  others 
become  prey  for  northern  sea  lions  and  presumably  to  killer  whales  and 
sharks;  still  more  are  lost  in  storms  at  sea.  Yet  more  than  enough  young 
seals  survive  each  year  to  maintain  a  large,  healthy  herd. 

Sealing  Operations  on  the  Pribilofs 

Young  subadult  male  seals  up  to  nine  years  of  age,  not  yet  strong  enough 
or  old  enough  to  compete  with  the  fully  matured  beachmasters,  congregate 
on  hauling  grounds  apart  from  the  rookeries  (Fig.  7).  An  occasional 
brave  subadult  as  young  as  age  seven  years  may  attract  a  female  or  two 
and  become  part  of  the  breeding  structure,  but  most  of  the  younger  males 
are  not  permitted  on  the  rookeries  until  the  active  breeding  season  ends 
in  early  August.  At  this  time,  some  young  females  making  their  first 

22 


#^^T  **  -4] 


Figure  7.  A  part  of  the  Tolstoi  Rookery  on  St.  Paul  Island  showing  the 
social  structure  of  northern  fur  seals  during  the  breeding  season.   In 
the  foreground  are  the  breeding  seals  and  pups.  Beyond  the  margin  of 
the  breeding  area  are  massed  the  idle  males,  seven  to  nine  years  old. 
Still  other  idle  males  wait  attentively  just  offshore,  apparently  for  an 
opportunity  to  barge  into  the  breeding  area  to  forcefully  displace  an 
exhausted  beachmaster. 


23 


appearance  on  the  rookeries  may  breed  with  these  young  males. 

It  is  from  these  hauling  grounds  that  the  younger  fur  seals,  primarily 
three  and  four  year  old  male  animals,  are  driven  for  the  annual  harvest  of 
skins.  Because  the  number  of  males  and  females  at  birth  is  approximately 
equal,  and  since  adult  males  control  and  breed  an  average  of  60  females 
each,  the  majority  of  these  young  males  are  surplus  to  proper  maintenance 
of  the  herd.  Thus  a  properly  managed  taking  of  young  males  does  not 
endanger  the  reproductive  capacity  of  the  herd. 

National  Marine  Fisheries  Service  managers  and  scientists  travel  to  the 
Pribilof  Islands  each  year  to  supervise  the  harvest  of  fur  seals  and  to 
carry  out  biological  research  on  these  animals.  Son?  of  the  Aleut  residents 
work  in  all  phases  of  the  harvest  and  in  parts  of  the  scientific  research 
program. 

Removing  subadult  male  seals  from  the  hauling  grounds  is  comparatively 
easy.  Since  they  are  apart  from  the  rookery,  harvest  acts  do  not  disturb 
breeding  animals  on  the  rookeries.  Daybreak  of  each  morning  from  late 
June  until  late  July  finds  the  Aleut  sealers  on  one  or  more  hauling 
grounds.  From  these  hauling  areas,  they  drive  the  seals  a  short  distance 
inland  from  the  beaches  to  suitable  harvesting  grounds.  Because  of  their 
insulating  fur,  the  seals  are  driven  slowly  and  given  rest  periods  as 
needed  to  avoid  discomfort  and  possible  heat  prostration.  Small  pods  con- 
taining about  six  seals  are  separated  from  the  main  group  and  herded  to  the 
stunners  where  each  animal  is  dispatched  by  first  stunning  it  with  a 
single  blow  to  the  head,  then  immediately  severing  the  main  blood  vessels 

24 


of  the  heart.  Blood  pressure  immediately  drops  to  zero  and  death  is 
virtually  instantaneous.   Females  and  animals  larger  or  smaller  than 
the  size  limits  set  are  permitted  to  escape  and  rejoin  the  herd. 

During  recent  years  a  great  deal  of  investigation  has  been  done  to  assure 
that  the  method  used  to  harvest  seals  on  the  Pribilof  Islands  is  the  most 
humane  possible.  Various  Government-sponsored  and  non-Government  groups 
have  examined  the  methods  used.  These  groups  include  the  World  Federation 
for  the  Protection  of  Animals,  a  Task  Force  to  Study  Alternative  Methods 
of  Harvesting  Fur  Seals,  the  Virginia  Mason  Research  Foundation,  a  veterinary 
panel  composed  of  members  of  the  American  Veterinary  Medical  Association's 
Research  Panel  on  Euthanasia,  and  the  Battel le  Institute  of  Columbus,  Ohio. 
The  conclusions  reached  were  that  the  method  in  use  is    a  rapid,  highly 
efficient  and  humane  method  of  harvesting  the  fur  seals.  Various  recommen- 
dations were  made  to  improve  the  harvesting  procedures  and  these  have  been 
adopted.  A  continuing  review  of  the  harvesting  methods  is  maintained  as 
well  as  close  relationship  with  the  American  Veterinary  Medicine  Association 
and  the  Department  of  Agriculture  to  assure  that  the  National  Marine 
Fisheries  Service  is  familiar  with  current  research  and  practices  regarding 
the  humane  killing  of  domestic  livestock  and  other  animals. 

After  the  pelts  are  taken,  they  are  transported  to  a  processing  plant 

on  the  island  where  they  are  cooled,  washed,  and  the  fat  or  blubber  removed 

(Fig.  8).  The  pelts  are  then  cured  in  brine,  allowed  to  drain,  treated 

with  salt  and  boric  acid,  packed  in  containers  for  shipment  and  transported 

to  other  locations  in  the  U.S.  for  sale  and  the  further  processing  needed 
to  finish  them  into  high  quality  furs.  The  meat  is  used  primarily  as 

25 


Figure  8.  In  years  past,  the  fat  (blubber)  was  removed  manually  from 
the  sealskins.  Machines  are   now  used  for  this  phase  of  the  operation, 


26 


mink  food;  however  the  Aleut  inhabitants  of  the  Islands  eat  a  considerable 
amount  as  a  desired  part  of  their  diet. 

Managing  the  Fur  Seal  Herd 

From  the  time  the  Federal  government  assumed  responsibility  for  management 
of  the  fur  seal  herd  in  1910,  it  has  adhered  to  a  policy  of  taking  only  those 
animals  considered  surplus  to  breeding  requirements.  The  harvest  was 
restricted  essentially  to  young  males,  from  1911  through  1955,  although  a 
few  females  were  mistakenly  killed  each  year  and  some  were  taken  for 
research  from  time  to  time.  From  1904  through  1912  and  again  from  1923 
to  1932,  a  minimum  yearly  breeding  reserve  of  several  thousand  subadult 
males  was  provided  by  marking  them  with  a  brand  or  shearing  a  patch  of  fur, 
then  permitting  them  to  return  to  the  sea.  An  adequate  breeding  stock  was 
further  assured  by  limiting  the  killing  season  each  year  to  a  period  from 
the  latter  part  of  June  to  the  end  of  July  and  by  taking  only  those  male 
seals  within  prescribed  body-length  limits. 

By  1956,  a  climbing  mortality  rate  among  the  pups  on  land  alerted  scien- 
tists to  the  possibility  that  the  seal  population  was  too  high.  Therefore, 
a  program  was  begun  under  the  auspices  of  the  North  Pacific  Fur  Seal 
Commission  to  reduce  the  number  of  pups  born  annually  by  removing  pres- 
cribed numbers  of  breeding  females  from  the  herd  over  a  period  of  several 
years.  The  number  of  breeding  females  was  reduced  because  all  available 
evidence  (increasing  pup  mortality  on  land,  wide  fluctuations  in  the 
annual  harvest  of  males,  and  failure  of  the  trend  in  the  harvest  of  males 
to  continue  the  spectacular  increase  which  began  in  the  1920's)  indicated 


21 


that  the  population  was  above  the  level  which  would  provide  the  maximum 
sustainable  productivity  required  by  the  treaty.  A  reduction  of  herd 
size  to  reach  the  level  of  maximum  sustainable  producitvity  is  based  on 
the  premise  that  if  a  population  is  allowed  to  expand  to  its  natural  peak, 
there  is  an  accompanying  increase  in  the  death  rate  attributable  to  such 
factors  as  insufficient  food,  disease,  and  injuries  associated  with  over- 
crowding. 

Managers  of  the  fur  seal  resource  of  the  Pribilof  Islands  have  been  con- 
ducting research  to  determine  the  population  level  at  which  the  birth  rate 
is  the  highest  and  the  death  rate  from  natural  causes  is  lowest,  which 
in  turn  allows  a  maximum  sustainable  harvest.  Scientists  have  estimated 
that  the  maximum  sustainable  productivity  for  the  Pribilof  fur  seals  is 
attained  when  350,000  to  400,000  pups  are  born  per  year.  The  number  of 
pups  born  annually  is  now  within  this  range;  however,  the  death  rate  of 
young  animals  at  sea  apparently  has  increased  in  recent  years  and  extensive 
experimentation  is  underway  to  determine  the  cause. 

The  harvesting  of  seals  on  St.  George  Island  was  terminated  so  that  the 
rookery  and  hauling  ground  complexes  there  might  become  a  research  control 
area  in  a  major  scientific  research  program  to  compare  a  harvested  population 
(St.  Paul)  to  an  unharvested  population  (St.  George).  Research  is  underway 
to  determine  the  size  of  various  herd  elements,  causes  of  death  among  pups, 
and  behavior  of  all  the  animals  as  related  to  reproduction.  Another  phase 
of  the  program  involves  the  collection  of  data  at  sea  on  abundance  and 
distribution  of  seals,  as  well  as  on  feeding  habits  and  availability  of 

28 


prey  species. 

Scientists  of  the  National  Marine  Fisheries  Service  monitor  several  herd 
elements  each  year  to  determine  how  the  resource  is  responding  to  management 
practices.  An  estimate  of  the  number  of  pups  born  is  obtained  and  the 
number  that  survive  to  harvestable  ages  is  determined.  The  number  of  adult 
males  on  the  rookeries  and  hauling  grounds  is  counted  as  a  check  on  the 
adequacy  of  numbers  of  young  males  permitted  to  escape  the  harvest  (Fig.  9). 
Pups  that  die  on  the  rookeries  are  counted  to  provide  additional  information 
on  early  mortality,  and  dead  pups  collected  from  study  areas  are  examined 
for  causes  of  death. 

Developing  and  applying  correct  management  practices  for  the  seals  is  a 
continuing  process  and  improvements  are  made  as  new  information  becomes 
available—all  part  of  the  long-term  program  to  assure  that  the  Pribilofs 
will  always  be  blessed  with  an  abundance  of  northern  fur  seals. 

The  Human  Factor 

With  the  Pribilof  spotlight  focused  so  intently  upon  the  seal,  there 
sometimes  is  a  tendency  to  forget  that  humans  are  very   much  involved- 
humans  whose  own  existence  is  closely  interwoven  with  the  welfare  of  the 
northern  fur  seal . 

When  the  U.S.  Government  assumed  responsibility  for  the  Pribilof  fur  seal, 
it  also  assumed  responsibility  for  the  inhabitants  of  the  Pribilof  Islands- 
Aleuts  who  were  taken  there  from  the  Aleutian  Islands  by  the  Russians  nearly 
two  centuries  ago  to  provide  a  labor  force  for  harvesting  seals. 

29 


Figure  9.  Scientist  counting  adult  males.  Tripods  and  catwalks  provide 
safe  vantage  points  for  the  observer.  The  bamboo  pole  is  carried  as  an 
aid  in  counting  and  to  ward  off  aggressive  bulls. 


30 


Federal  Government  responsibilities  associated  with  fur  seal  management 
provides  the  major  source  of  income  for  the  Aleuts  who  live  in  the  two 
Pribilof  communities  on  St.  Paul  and  St.  George  Islands.  All  workers 
employed  by  the  United  States  receive  standard  government   wages  in 
accordance  with  the  work  performed  and  the  time  employed.  The  Aleut 
Community  of  St.  Paul,  the  City  of  St.  Paul,  the  U.S.  Postal  Service, 
National  Weather  Service,  and  U.S.  Coast  Guard  also  provide  some  employment. 
The  Tanadgusix  Corporation  and  Tanaq  Corporation,  on  St.  Paul  and  St. 
George  respectively,  also  offer  training  and  work  in  their  expanding  enter- 
prises. 

St.  Paul  (Fig.  10),  the  larger  of  the  two  inhabited  islands,  is  home  to 
about  450  residents  and  St.  George  has  a  population  of  about  150  people. 
Some  of  the  present  residents  can  trace  their  ancestry  back  for  180  years; 
more  than  95  percent  of  the  inhabitants  were  born  on  the  Pribilofs. 

The  island  villages  have  facilities  comparable  to  those  of  many  towns 
in  Alaska,  including  frame  houses,  electrical  service,  water,  police 
department,  volunteer  fire  department,  and  sewer  systems.  St.  Paul  has 
year-round  commercial  airline  service;  St.  George  has  twice  monthly  air- 
charter  service.  Both  communities  boast  of  color  TV  stations.  St.  Paul 
has  several  local  businesses:  a  hotel  with  dining  room,  two  cafes,  a  movie 
house,  grocery  store,  post  office,  tavern,  barber  shop,  laundry  and  gasoline 
station.  Satellite  telephone  communications  began  service  in  May  1976, 
and  practically  ewery   family  has  at  least  a  short-wave  or  long-wave  radio. 
Local  and  inter-island  communications  are  conducted  by  radio. 


31 


Figure  10.  Part  of  the  village  of  St.  Paul  on  the  south  cape  of  St.  Paul 
Island  is  close  to  several  seal  rookeries,  including  Reef,  one  of  the 
larger. 

32 


The  school  building  in  use  on  St.  George  Island  was  built  in  1955;  a  new 
school  was  completed  on  St.  Paul  in  1973.  Education  to  the  10th  year  is 
available  on  St.  Paul  Island.  Elementary  education  only  is  available  on 
St.  George.  To  complete  their  high-school  education,  or  continue  with 
additional  training,  Pribilof  youngsters  must  go  to  the  mainland. 

The  Aleuts  are  U.S.  citizens  who  vote  in  local,  State,  and  national  elections 

The  Alaska  Native  Claims  Settlement  Act  of  1971  is  stimulating  many 
changes  for  the  Aleut  people  of  St.  Paul  and  St.  George.  The  land  and 
houses  will  no  longer  be  solely  owned  by  the  Federal  Government  as  a 
special  reservation.  For  the  first  time,  the  homes  will  be  privately  owned 
by  the  people  residing  in  them  and  a  large  percentage  of  the  land  on  St. 
Paul  and  St.  George  Islands  will  be  owned  by  the  two  Corporations  represent- 
ing the  two  villages.  Buildings  surplus  to  Government  needs  have  been 
released  for  selection  by  the  Corporations.  The  Government  has  retained 
that  land  necessary  for  administering  the  seal  herds  and  carrying  out  other 
obligations  under  the  Fur  Seal  Act  including  the  seal  rookeries,  air  strips, 
utility  systems,  and  other  facilities  and  land  necessary. 

Since  both  federal  and  private  land  will  occur  side  by  side,  a  substantial 
mutual  interest  exists  between  the  National  Marine  Fisheries  Service  and 
the  Aleut  people  in  the  cooperative  use  of  this  land  in  the  joint  interest 
of  the  resident  people  and  the  fur  seals  and  other  wildlife.  A  Joint 
Management  Board  has  been  formed  and  a  Joint  Management  Agreement  drawn  up 
for  the  sole  purpose  of  providing  guidelines  for  the  joint  use  of  various 
facil ities. 

33 


The  Pribilofs  are  a  remote  treeless  group  of  islands  with  a  reasonably 
mild  climate  for  such  a  northern  latitude.  Agriculture  is  nonexistent. 
During  an  extremely  brief  growing  season  in  the  summer,  however,  dozens 
of  varieties  of  wildflowers  of  rare  color  and  beauty  spread  over  the 
landscape.  Bird  lovers  and  scientists  equipped  with  cameras  and 
binoculars  and  other  special  equipment  come  from  all  over  the  world  to  see 
tufted  puffins,  murres,  kittiwakes,  pelagic  cormorants,  and  many  other 
species.  A  small  herd  of  reindeer  roams  St.  Paul  Island  and  visitors 
driving  along  the  roadways  may  see  blue  Arctic  foxes  sitting  outside  dens 
with  their  young. 

It  is  the  story  of  the  northern  fur  seal,  however,  whose  herds  have  been 
returned  to  a  healthy,  stable  condition,  and  the  Aleuts,  a  people  success- 
fully undergoing  a  cultural  and  economic  transition,  upon  which  the  true 
drama  of  the  Pribilofs  is  based.  With  a  continued  spirit  of  international 
cooperation,  dedicated  research  programs  such  as  the  St.  George  Island 
reserve,  sound  management,  and  a  serious  concern  about  the  lands  and 
waters  where  the  fur  seals  return  to  breed,  history  can  be  assured  that  this 
magnificent  animal  will  continue  its  annual  migration  to  the  Pribilofs-to 
the  benefit  of  both  the  seals  and  the  humans  who  share  this  island  home. 


34 


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DECEMBER  1976